Objective To observe the effects of ilexonin A (IA) on IL-6 and M-CSF following ballon angioplasty in rabbit common carotide artery to provide experimental basis for percutaneous coronary interventions. Methods 30 Japanese rabbits were fed with high cholesterol food for 4 weeks. Then they were divided into three groups randomly. Each group had ten rabbits. ①Control group: the incision was sew directly after right carotide artery of the rabbit was seeked. ②Balloon dilation group:the proximal of the carotide artery was cuted,the ballon was delivered and distended,after it was drawn repeatly,the incision was closed. ③IA therapy group: operation was the same to the balloon dilation group,then IA was administered in vein.All of them were fed with high cholesterol diet for 4 weeks and the blood samples were collected 1 d before the operation and 1 d,1,2,4 weeks after the operation. The serum IL-6 and M-CSF levels were determined with radioimmunoassay.The pathological changes of injuried artery were observed. Results ①The IL-6 level in balloon dilation group was higher than that in IA therapy group after the operation (P

Objective To investigate the effects ofamiodarone (AMD) on simvastatin (SV) in human liver microsomes and the possible underlying mechanisms. Methods Time-, NADPH- and concentration-dependent inhibitions were tested in HLM. The logarithm of relative inhibition values was plotted versus preincubation time (0, 5, 10, 15, 20min) for a series concentration of AMD used (0, 2, 5,25, 50 μ mol/L), and the slopes determined by linear regression. These slope values represente the observed inactivation rate constants (kobs). A double-reciprocal plot was then constructed using the reciprocal of the ko～ (y-axis) and the reciprocal of the associated inhibitor concentration (x-axis) to estimate the values ofkinact and K, which were two principal kinetic constants that were specific for mechanism-based inhibition (MBI).drug-drug interactions (DDI) potential was predicted based on in vitro data and by using the in vitro-in vivo extrapolation. Results The time-, concentration- and NADPH-dependent charactga'istics confirmed that when SV was the substrate of CYP3A4, the inhibition of AMD to CYP3A4 is MBI. Kj and kinact value were calculated to be 5.1 μ mol/L and 0.018min-1 The Clint of SV was reduced 2.96-5.63 fold when it was administrated with AMD. Conclusion Based on the results, AMD would inhibit SV metabolism via the mechanism-based manner, which would lead to DDI when they are taken together. Careful clinical observation is recommended when AMD and SV have to be simultaneously prescribed.